Yesterday i was announcing the Defcon 19 dvd download in Dragonjar comunitty,the dvd has all presentations,specifications for all design about badges and more ....
You can download herehttp://defcon.org/ obviously,specificlyhttps://media.defcon.org/dc-19/defcon-19-dvd-updated.iso (~1.7 GB)
i have seen a little of this presentations in my free time and until now i like some presentations

"Deceptive Hacking " by bruce Barnet aka grymoire

Let’s say that a hacker desires to extract large amounts ofintellectual property from a network. However, steganography andcovert channels would take too long. Instead, the hacker desires toobtain the information as quickly as possible, without alerting thevictims that the information was obtained.

In this presentation he explains a little Se Tips,and interesting concepts techniques about psychology.

and other interesting presentation was did by Ming show "Abusing Html5 ",his analisys as centre in pricipal flaws in the new Html version and some links :